原帖由： originalmachead ,
IF you have put things on it or forced it into a small enclosure '''you could have a cracked battery. ''' ''My MBA behaved in this way, it would work for a while, then suddenly stop, or refuse to reboot. Occasionally I got the dreaded X in the menu bar. '' I had a crack clear across the battery. I could not see this when the battery was in the machine but when I picked it up and looked at it I could see it separate. I know exactly when someone put their luggage on top of my messenger bag in an overhead bin. But, it took weeks for the correlation to occur in my mind. Good Luck, ''If this Answer is helpful''' please remember to return and mark it''' Accepted. ''